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Restraint harness performance during flight maneuvers: a parametric study.

Cheng-Fei Du, Xiao-Yu Liu, Li-Zhen Wang

    Aerospace Medicine and Human Performance
    |May 7, 2015
    PubMed
    Summary
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    The PCU-15/P harness shows poor performance in side impacts. Increasing strap stiffness and lap belt tension improves pilot restraint, with 60 N tension potentially sufficient for flight maneuvers.

    Area of Science:

    • Aerospace Engineering
    • Human Factors Engineering
    • Biomechanics

    Background:

    • Modern fighter aircraft generate high multi-axial acceleration environments.
    • These environments pose risks to pilot safety.
    • Evaluating restraint system performance is crucial for improving safety.

    Purpose of the Study:

    • To investigate the impact of strap stiffness, friction, and belt tension on restraint system performance.
    • To analyze restraint system behavior under -Gx, -Gy, and -Gz impacts.
    • To determine optimal parameters for pilot restraint systems.

    Main Methods:

    • A finite element model of a mannequin with a PCU-15/P harness was utilized.
    • Simulations were conducted for impacts along the -Gx, -Gy, and -Gz axes.

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  • The maximum displacement of the mannequin's torso was computed.

    • Main Results:

    • The mannequin's torso exhibited significant sideways displacement (>74 mm).
    • Increased strap stiffness and belt tension reduced torso displacement.
    • Friction had a minimal effect on restraint performance (decrease <6.7%).

    Conclusions:

    • The PCU-15/P harness demonstrated weakest performance during side impacts.
    • Lap belt tension is more critical than shoulder straps for limiting pilot movement.
    • A 60 N tension may be adequate for typical flight conditions.